Well-casing head.



l. PODOBIEDOFF.

WELL CASING HEAD.

APPLICATION FILED FEB. 2, 1915.

1 ,272,8 1 2. Patented July 9, 1918.

I'll 41 IWAN PODOBIEDOFF, OF PETROGRAD, RUSSIA.

WELL-CASING HE.

Specification of Letters Patent.

Patented July 9, 1918,

Application filed February 2, 1916. Serial No. 75,751.

To all whom it may concern:

Be it known that I, IwAN Pooonrnnorr, subject of the Czar of Russia,residing at Chornaia Retchka, 49, Petrograd, Russia, have inventedcertain new and useful Improvements in VVell-Casing Heads, of which thefollowing is a specification.

The object of this invention is-to provide means for washing throughwith slime the bore-end of a well in sinking the latter after the wellknown rope boring system, so that the boring process may be greatlyaccelerated, without modifying in any way the usual operationsnecessitated by the rope boring system. The said means consists of a capor hood adapted to be removably secured to the upper end of the workingtubular column or pipe and forming a chamher which communicates withthis pipe and is connected with the slime pressing pump.

In the drawing, Figure 1 shows a top View of the hood according to myinvention, one half of the cover being swung away. Fig. 2 is a sectionalelevation of the hood.

Fig. 3 is a detail sectional view of an interiorly-grooved bushcomprised in the invention.

A hood 1 having a branch 2 to be connected to the slime pressing pump,is mountedon the upper end of the working pipe 18, preferably by meanshereinafter described. This hoodis closed hermetically at the top by acover 3, in the center of which a stuffing box 4 is inserted having aball head 5, inside which stufling box reciprocates a tube 6; thislatter tube, fastened firmly on the boring rope 7, protects it from wearand at the same time prevents the slime delivered into the hood forwashing the well from escaping around the rope.

For rapidity and convenience in the periodical examination of the boringtool and replacing the same, the cover 3 is adapted to be opened in twohalves, the pin 8 of the hinge being fastened firmly to the body of thehood 1. The upper edge of-the hood 1 has a small projecting flange andthe cover 3 is provided at its lower peripheral edge with an annularflange 9, which is recessed on its inner side, so as to fit over theupper edge of the hood when the cover 3 is closed. To make a tight jointa rubber gasket 10 is laced in the recess of the flange 9 in bothiialves of the cover. On closing the cover 3 both its halves are firmlyconnected together by means of a rocking latch 11, provided with alocking screw 12.

In the center of the cover 3 (in both halves of same) a ball seat isformed for the ball head 5 of the stuifing box 4, this ball head 5 beingprovided in view of the fact that the boring rope, besides havinglongitudinal reciprocating movements when working, also oscillatesslightly sidewise. As stated above, a tube 6, about 12 feet long, passesthrough the stufling box at and can move freely in it along its entirelength. This tube is screwed at its upper end into the socket 13, thelatter having a taper thread at its upper end, by means of which itengages with a bronze, babbitted, bush 14, consisting of two halvesgrasping the boring rope 7. The recess in the bush halves is providedwith spiral grooves which are in strict accordance with the curls of therope. Thus, when the said socket 13 is screwed into the bush 14 itshalves grasp the rope tightly and fasten the tube 6 on 1t. 7

In the arrangement illustrated the hood 1 is fastened on the top of theworking pipe 18 by means of a divided ring 15 pivoted on the lower partof the pin 8 and provided with inner circumferential grooves 16inclosing elastic gaskets 17. On the two halves of the ring 15 beingconnected and tightened together by means such as a latch 11 or thelike, the hood is firmly secured to the upper end of the pipe. At thesame time the recessed flange 9 on the ring engages over the flange onthe lower edge of the hood.

The use of such a slime hood affords the possibility of applying slimewashing of the bore-end of the well to the widely known and practisedsystem of rope boring, which system, as is known, enables the work to begreatly accelerated. At the same time all the manipulations of ropeboring remain without change, as after having unscrewed the bush 14 andopened the cover 3 and the ring 15 (which with the present arrange mentof them is attained very rapidly-by throwing back the latches 11), thetool with the rope may be raised from the well quite freely and any toolor catching device may also be easily lowered into the well. \Vhileduring the work of sinking, when the beam rises andfalls the rope movesfreely, together with the tube 6 set on it, in the stuttmg-boz; 4;,without changing the normal iiethod work. The tube 6 is selected of suchlength as to permit the full length of the operating screw to beutilized with the utmost rise of the beam. The ball-shaped form of thesurfing-box head 5 admits small rocking movements of the tube 6 andtheretore; of the boring rope also in all directions. At the same timethe slime hood remains closed all the time and the slime pumped throughit by the pump is delivered continuously along the Working pipe 18 tothe bore-end of the well, thereby washing it, rises in the space aroundthe pipe and carries with it the borings obtained by the chisel, andoverflows over the brim of the well to the slime shed.

What I claim is:

1. In a rope-boring, well-sinking apparatus, the combination, with theinner or working pipe; of a hood adapted to removably rest on the upperend of said pipe and provided with an inlet for washing-fluid said hoodhaving its top and bottom edges turned laterally outward and also havingan exteriorly-located vertical pivot securely attached to its body andprojecting at opposite ends above and below said edges; a two-part ringhaving its members pivoted at one end to the lower end of said pivot andarranged to encircle said pipe when closed together, said ring membersbeing formed at their upper edges with interiorlyrecessed flangesadapted to fit over the outturned lower edge of the hood so as to clampthe latter in place on the pipe end; means for fastening the free endsof the ring members together in closed position; a two-part coveradapted to rest upon the upper end of said hood and having its memberspivoted to the upper end of said pivot, the lower edges of said covermembers being formed with interiorly-recessed flanges adapted to fitover the out-turned edge of said hood so as to clamp said cover in placeon said hood; and means for fastening the free ends or the cover memberstogether in closed position; said cover members bein' provided withmating openings throug which the boring rope passes, and both said covermembers and said ring members being adapted to be opened or spread apartto disengage their flanged ends from the out-turned edges of the hoodand to permit the hood, ring and cover to be removed bodily as a unitfrom the pipe.

2. In a rope-boring, well-sinking apparatus, the combination, with theinner or working pipe, of a hood adapted to removabl rest on the upperend of said pipe and provided with an inlet for washing fluid, said hoodhaving an eXteriorly-located vertical pivot securely attached to itsbody and projecting at opposite ends above and below the edges oi saidbody; a two-part ring having its members pivoted at one end to the lowerend of said pivot and adapted to encircle said pipe when closed togetherand to engage said hood to connect the latter to the pipe; a two-partcover for the top of said hood having its members pivoted at one end tothe upper end of said pivot and adapted when closed together, to engagesaid hood so as to retain the cover in place thereon; and devices forfastening together't-he free ends of the ring and cover members; saidcover members being provided with mating openings through which theboring rope passes, and both said cover members and said ring membersbeing adapted to be opened or spread apart to disengage them from thehood and to permit the hood, ring and cover to be removed as a unit fromthe pipe.

In testimony whereof I attix my signature.

IWAN PODOBIEDOFF.

\Vitness'cs T. MIcnMLoosKY, R. Lovmcnnx'.

